/*
Get Head Set from Java TreeSet example
This Java Example shows how to get the portion of TreeSet containing the values
less than the specified value using headSet method of Java TreeSet class.
*/
import java.util.SortedSet;
import java.util.TreeSet;
public class GetHeadSetFromTreeSetExample {
public static void main(String[] args) {
//create TreeSet object
TreeSet tSet = new TreeSet();
//add elements to TreeSet
tSet.add("1");
tSet.add("3");
tSet.add("2");
tSet.add("5");
tSet.add("4");
/*
To get a Head Set from Java TreeSet use,
SortedSet headSet(Object fromElement) method of Java TreeSet class.
This method returns the portion of TreeSet containing elements less than
fromElement.
Please note that, the SortedSet returned by this method is backed by
the original TreeSet. So any changes made to SortedSet will be
reflected back to original TreeSet.
*/
SortedSet sortedSet = tSet.headSet("3");
System.out.println("Head Set Contains : " + sortedSet);
}
}
/*
Output would be
Head Set Contains : [1, 2]
*/
